Update Baresip to 0.4.8, and the supporting re and rem libraries
to their latest versions
Several new modules, however some will no longer work after changes to the
core code; a best effort has been made to investigate and mark such broken
modules.

Introducing baresip 0.4.2, along with the same versions of libre and librem.
re and rem must be updated first, since baresip will not compile against older
versions.
[
Fix linking of Speex modules
PR: ports/174925 (based on)
Submitted by: Anish Mistry <amistry@unitedware.com>
]